A security cover is disclosed for protecting installed avionics instruments and other electronic instruments. The cover includes multiple independent automatic locks that activate when the cover is abutted near the installed instruments. An automatic lock mechanism, adapted to electr

A mounting bar system permitting infinite adjustability in mounting avionics-components trays and Dzus-mounted avionics in at least one aircraft cockpit instrument panel assembly. Each mounting bar is slotted along its longitudinal axis. The slot is made to include the shape of a T s